JPS6135784Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-plate clutch mechanism such as a transmission, and more particularly to a clutch plate separation device thereof.

A conventional multi-disc clutch mechanism for a transmission is shown in Fig. 1, in which a plurality of discs are connected between a hub b on the input shaft side of the clutch mechanism a and a housing d that rotates integrally with the output shaft g. A clutch plate c is provided.

When the piston e moves to the right in the figure against the spring f by the pressure oil supplied through the oil passage h, the clutch plates c come into close contact with each other, transmitting rotational power from the hub b to the housing d. It has become possible to communicate.

Also, when the supply of pressure oil is stopped, the spring f
As a result, the piston e is returned to the left, each clutch plate c is released, and power transmission from the hub b to the housing d is cut off.

By the way, even if the piston e returns to the left when the supply of pressure oil is stopped, the clutch plates c may not be able to completely separate from each other and may remain partially in contact with each other. If the hub b on the input shaft side rotates in such a state, the loss of power consumed in the clutch portion (slip loss) increases, and there is a risk that the clutch plate c may be burnt out.

The present invention attempts to solve these problems by making it possible to quickly separate the clutch plates from each other when cutting off power transmission in a multi-disc clutch mechanism, thereby reducing slip loss. An object of the present invention is to provide a clutch plate separating device that has the following functions.

For this reason, the clutch plate separating device of the present invention is a multi-plate clutch mechanism, in which a plurality of clutch plates are provided between the inner periphery of the housing on the output shaft side and the hub on the input shaft side, and these clutch plates are separated. A push plate is attached to the hub, and is provided with a pressing means for frictional engagement, and has a convex portion that is elastically deformed by each clutch plate on the hub side when the clutch plates are engaged with each other by the pressing means. The clutch plate is characterized in that when the clutch plate is released from the pressing force of the pressing means, the elastic restoring force of the convex portion promotes mutual separation.

Hereinafter, a clutch plate separation device for a transmission as an embodiment of the present invention will be explained with reference to the drawings.
FIG. 2 is a sectional view showing the main parts thereof, FIG. 3 is a perspective view of the push plate, and FIG. 4 is a partial sectional view taken along the line - in FIG.

As shown in FIG. 2, in a multi-plate clutch mechanism 1, a clutch consisting of a plurality of friction plates 4 and a mating plate 5 is disposed between a hub 2 on the input shaft side and an inner circumference of a housing 6 on the output shaft side. A plate 3 is provided, a friction plate 4
has its inner periphery splined to the hub 2,
Although the mating plate 5 can move axially relative to the hub 2, it rotates integrally with the hub 2, and the mating plate 5 can move axially relative to the housing 6, but rotates integrally with the housing 6. I'm starting to do it.

When the piston 7 provided in the housing 6 moves to the right in the figure against the spring 8 by the pressure oil supplied through the oil passage 9, the friction plate 4 as the clutch plate 3 and the mating plate 5 are pressed against each other and frictionally engage with each other, thereby transmitting power from the hub 2 on the input shaft side to the housing 6 on the output shaft side.

In the device of the present invention, the hub 2 is further provided with a push plate 10.
As shown in FIG. 3, this push plate 10 is provided with a plurality of elastic convex portions 11 formed by cutting and bending the plate, as well as bent engagement edges 12 and tightening grooves 13 at both ends. It is equipped with

The push plate 10 has its engagement edge 12 engaged with a hole 15 formed at the end of the hub 2, and after a plate 16 is inserted between the push plate 10 and the hub 2, the engagement edge 12 is inserted into the tightening groove 13. By attaching a retaining ring 17 to the hub 2, it is fixed in a groove 14 formed by cutting out one of the spline teeth 2a of the hub 2, as shown in FIG.

Each convex portion 11 of the pushing plate 10 is caused by the friction plate 4 as a clutch plate on the hub 2 side when the friction plate 4 and the mating plate 5 are pressed rightward by the piston 7 and frictionally engage with each other. It is designed to be elastically deformed.

Therefore, when the pressurized oil supply to the piston 7 is stopped and the clutch plate 3 is released from the pressing force, each convex part 11 of the push plate 10 is elastically restored by the force that causes each friction. This acts to push the plate 4 back to the left, thereby promoting separation of the friction plate 4 and the mating plate 5.

Incidentally, a plurality of push plates 10 are attached to the hub 2, so that when the clutch is released, the friction plate 4 and the mating plate 5 can be forcibly shifted from a close state to a separated state.

As described in detail above, according to the clutch plate separating device of the present invention, when the clutch plate 3 is released from the pressing force of the pressing means 7, the convex portion 11 of the pressing plate 10
Since the elastic restoring force of the friction plate 4 promotes mutual separation, the friction plate 4 and the mating plate 5 do not rotate idly while contacting each other.
This has the advantage of extending the life of the friction plate 4 and significantly reducing idling loss.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the main parts of a conventional multi-plate clutch mechanism, and FIGS. 2 to 4 show a clutch plate separating device as an embodiment of the present invention.
3 is a perspective view of the push plate, and FIG. 4 is a partial sectional view taken along the line - in FIG. 2. DESCRIPTION OF SYMBOLS 1... Multi-plate clutch mechanism, 2... Hub on the input shaft side, 2a... Teeth, 3... Clutch plate, 4...
Friction plate, 5... mating plate, 6... housing on the output shaft side, 7... piston as pressing means, 8...
Spring, 9... Oil path, 10... Push plate, 11
... Convex portion, 12 ... Engagement edge, 13 ... Tightening groove, 14 ... Groove, 15 ... Hole, 16 ... Plate, 17 ... Retaining ring.

Claims (1)

[Scope of utility model registration request] In the multi-plate clutch mechanism, a plurality of clutch plates are provided between the inner periphery of the housing on the output shaft side and the hub on the input shaft side, and a pressing means for frictionally engaging these clutch plates is provided, and the pressing means A push plate having a convex portion that is elastically deformed by each of the clutch plates on the hub side when the clutch plates engage with each other is attached to the hub, and the clutch plate responds to the pressing force of the pressing means. 1. A clutch plate separating device characterized in that when the clutch plates are released from each other, mutual separation is promoted by the elastic restoring force of the convex portions.